Electronic telephone system



June 23, 1959 Filed May 16, 1956,

R. B. TROUSDALE ELECTRONIC TELEPHONE SYSTEM LS-ll LINE SWITCH FIGS. l7 8: l8

LS-l2 LINE SWITCH 48 Sheets-Sheet l RCUIT RCUIT INVENTOR. ROBERT B. TROUSDALE AGENT e 1959 R. B. TROUSDALE ELECTRONIC TELEPHONE SYSTEM 48 Sheets-Sheet 3 Filed May 16, 1956 LINK I T NES l O FINDER CONNECTOR GENERATOR FIG-S. 21-28 INCL.

FIGS. l5 8:20

AL-l

DIAL TONE CONNECTOR June 23, 1959 Filed May 16, 195s RINGING CONTROL AMPLIFIER FIG. 34

BINARY PULSE V GENERATOR FIGS. 29 830 R. B. TROUSDALE 2,892,035

LINK 3 MULTIPLE POINT REGISTER DRIVE PULSE GENERATOR FIG. 34

RDP

I SAMPLING PULSE GENERATOR M sT R OSCILLATOR FIG.29

June 23, 1959 TRQUSDALE 2,892,035 I ELECTRONIC TELEPHONE SYSTENI Filed May 16, 195 v I I I 48 Sheets-Sheet e LINK 3 I I FINDER CONNECTOR TRUNK HUNTING MARKER BUSY LEAD CONVERTER 8 EMERGENCY SERVICE CIRCUIT EXECUTIVE CUT-IN MARKER June 1959 R. B. TROUSDALE 2,

ELECTRONIC TELEPHONE SYSTEM Filed May 16, 1956 48 Sheets-Sheet 7 FIG. FIG. FIG.

FIG. FIG. FIG.

FIG. FIG.

FIG. FIG. FIG. FIG. FIG. FIG. FIG. FIG. FIG. I I I2 l3 l4 I5 2| 22 23 24 FIG. FIG. FIG. FIG. FIG. FIG. FIG. FIG. FIG. v I6. I7 I8 I9 26 27 28 FIG. FIG. FIG. FIG. FIG. FIG. FIG. FIG. FIG. FIG. FIG. FIG. 29 30 3| 32 33 34 35 36 37 38 39 4| I FIG.

June 23, 1959 R. B. TROUSDALE 7 2,892,035

ELECTRONIC TELEPHONE SYSTEM Filed May 16, I956 48 Sheets-Sheet a LINK ALLOTTER I6 AL-3 AL-4 ALI-5 AL-6 AL-7 TO FINDER CONNECTOR LINKS 2-I5 R. B. TROUSDALE ELECTRONIC TELEPHONE SYSTEM June 23, 1959 Filed May 16, 1956 48 Sheets-Sheet 9 LINK ALLOTTER I6 AL-l5 AL-IZ AL-l3 AL-ll AL-l4 'AL-IO n 1959 R. B. TROUSDALE 2,

ELECTRONIC TELEPHONE SYSTEM Filed May 16, 1955 48 Sheets-Sheet 10 Fq 'fijl LINE SWITCH CIRCUIT FOR EMERGENCY SERVICE LINE To T22 EMERQENCY R2 SERVICE 0 m C RY 22 CIRCUIT 22 I scz FROM FINDER CONNECTOR LINK 2 ESR2 BILATERAL TRANSISTOR CONTROL STAGES 3-l4 NOT SHOWN l I SCIS 0--- FROM FINDER CONNECTOR LINK l5 ESRIS ESR June 23, 1959 R.- B. TROUSDALE ELECTRONIC TELEPHONE SYSTEM Filed. May 16,- 1956 48 Sheets-Sheet 11 BILATERAL TRANSISTORS mos-m4 uo'r SHOWN ESR June 23, 1959 R. B. TRQUSDALEQ 2,

ELECTRONIC TELEPHONE SYSTEM Filed May 16, 1956 48 Sheets-Sheet l2 1- g 15 SWITCH BANK TRANSLATOR l3 SBT SCI

ESR

June 23, .1959

Filed May -l6, 1956 R. B. TROUSDALE ELECTRONIC TELEPHONE SYSTEM 48 Sheets-Sheet 1 5 June 23, 1959 I R. s. TROUSDALE I 1 25 ELECTRONIC TELEPHONE SYSTEM Filed may 16, 1956 y-1 TON-E a PULSE GENERATOR 29 48 Sheets-Sheet 14 scl' ESR I June 23, 1959 48 Sheets-Sheet 1e if'ywl7 Filed May 16, 1956 LINE SWITCH CIRCUIT LS-ll TH Rll BLS SBT

ARYII R. B. TROUSDALE ELECTRONIC TELEPHONE SYSTEM J ne 23, 1959 Filed May 16, 1-956 5 Q7 LINE SWITCH CIRCUIT LS-ll 48 Sheets-Sheet 17 LRC June 23, 1959 Filed May 16, 1956 LINk I jMULTIPLE POINT l4-l I908 7 I906 L I TONES I A Y I I I904 I! I l v I LINK 2 MULTIPLE POINT I4-2 I FROM FINDER I WY m o coNNEc'roR'LINK I905 I I ll I l I I MULTIPLE POINTS FOR LINKS 3-l4 NOT sI- owN l I.

LINK I5 MULTIPLE POINT l4-l5 FROM FINDER I903 \M' TQNES 0 CONNECTOR LINK I5-l5. Ll5

- R. B. TROUSDALE 2,892,035

ELECTRONIC TEL PHONE SYSTEM 4s Sheets-Sheet 1s TONES l June 23, 1959 Fild May 16, 1956 R. B. TROUSDALE ELECTRONIC TELEPHONE sysmw fi' TONE a PULSE GENERATOR 29 DIAL TONE BUSY TONE 48 Sheets-Sheet l9 scl' LRC

ESR

R. B. TROUSDALE 2,892,035

ELECTRONIC TELEPHONE SYSTEM June 23, 1959 Filed'May 16, 1956 if -zf FINDER CONNECTOR |5| 48 Sheets-Sheet 2O 

